Bobbin-holder.



No. 783.729. PATENTED FEB. 28, 1905.

T. J. MURDOCK. BOBBIN HOLDER.

APPLICATION FILED $1313. 3. 1904.

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llniiTnn STriTns Patented February 28, Teen.

PATENT Urincn.

l TlTI-iOMAS J. WURDOCK, OF FRANKLIN, MASSACHUSETTS, ASSlG-NOH TO MURDOCK 8: GER COMPANY, OF FRANKLIN, MASSACl-IUSETITS.

BOBBlW-HULDEW.

SPECIFICATION forming part of Letters Patent N0. 783,729, dated February 28, 1905.

Application filed Fehrua1y 3, 1904. Serial No. 191.877.

To (1 71 11/72/0722, it um/y concern.-

Be it known that l, TnioivmsJ. lyinnnoou, a citizen of the United States, residing at Franklin, in the county of Norfolk and State of Massachusetts, have invented a new and useful l.111]1)1'O\ '81'I16I1il in Bobbin-l-Iolders, of which the following is a specification.

This invention has reference to an improvement in bobbin-holders used to secure bobbins to the spindles o't' spinning-mules orspin mug-machines.

The object oi my invention is to simplify and strengthen the construction of an automatic bobbinholder adapted to securely clamp the bobbin to the spindle by adownward movement of the bobbin on the spindle and to release the bobbin by an upward movement of the bobbin by the operator.

My invention consists in the peculiar and novel construction of an automatic bobbinholder having clampingarms shaped to enter the peripheral groove in the head of the bobbin, said arms being held in their contracted position under spring tension by an annular coil-spring, and means for pivotally securing the clamping-arms to firmly support the same and to allow a limited in-and-out movement of the arms in the holder, as will be more fully set forth hereinafter.

Figure l is a vertical view of a spindle provided with my improved automatic bobbinholder, showing a full bobbin secured to the spindle by the holder. Fig. 2 is an enlarged plan view'of the clamping-arms shown in the position they would assume when assembled in the holder. Fig. 3 is a top view of the pivot-plate. Fig. 4 is a top view of the locking-plate. Fig. 5 is a transverse sectional view taken on line X X of Fig. 1 through the holder looking upward, showing the lower ends of the clamping-arms held in their relative position in the holder by the pivot-plate. Fig. 6 a vertical sectional view taken centrally through one of the clampingari'ns in the holder, showing the construction of the holder and bobbin-head. Fig. 7 is a perspective view of one of" the clamping-arms lookmg at the inside of the arm. Fig. 8 is an enlarged detail sectional view taken on line Y Y of Fig. 3, showing one oi the upwardlybent ends on the pivot-plate; and Fig. 9 is an enlarged detail sectional view taken on line Z Z of Fig. 4, showing the shape of the oflsets on the locking-plate.

In the drawiiiigs, (1/ indicates the bobbin, 1) the spindle, and (2 my improved automatic l )obbinholder. The bobbin a has the head a, in which is the usual peripheral groove 11 The lixed parts of the holder aresecured together by the ring (5, formed like an eyelet, having the head ('5' to form a shoulder and the whole secured to the spindle by driving the ring (Z onto the spindle. The frame c of the holder has the central hole a in the bottom, through which the ring (Z extends, the openings a in the bottom under the clamping-arms, and the upwardly-extending circular rim The pivot-plate f has the central hole f for the ring (Z and the arms f f with the upwardly-bent endsff", the arms being shaped to form the recessed openings f" f, in which the lower ends of the clamping-arms are held. The clamping-arms g 1, the construction of which is clearly shown in Fig. 7, have the lower ends 9 shaped to loosely [it the recessed openings j f in the pivot-platef, the central slot 7" extending through the side and lower end of the arm and the upper outthe peripheral groove a in the bobbin-head and to hold the annular spring i in its operative position on the clamping-arms. The locking-plate 7:. has the central hole /t for the ring Z and the u;iwardlyturned ol'l'sets l1. h.

.In assembling the parts of my improved bobbin-holder the lower ends y of the clamping-arms are placed in the recessed openings f f" of the pivot-plate f between the bottom of the frame (4 and the locking-plate 71.. The ring (Z is now passed through the cen tral holes in the frame a, the pivot-plate f, and the locking-plate h and the whole secured together by upsetting the upper end of the ring (5 onto the lockingplate it. The up wardly-bent endsy f on the pivot-plate 7" wardly-turned lipped end y shaped to enter bear on the sides of the clamping-arms, and the offsets 7& if on the locking-plate h enter the slots 9 in the arms, forming guides and supports for the arms and preventing side movement of the arms. The pivot-plate 7 is thicker than the lower end of the clampingarms, thus giving a predetermined amount of play for the lower end of the arm between the bottom of the frame 6 and the locking-plate it and limiting the in-and-out movement of the clamping-arms. Theupwardly-extendingrim on the frame 6 also limits the outward movement of the clamping-arms.

In the operation of my improved bobbinholder a downward movement of the bobbin on the spindle by the operator brings the head ofthe bobbin between the clamping-arms forcing them outward against the tension of the annular spring a until the upper ends of the arms enter the groove in the head of the bobbin, securely holding the bobbin on the spindle, and an upward movement of the bob- ,bin by the operator is all that is required to release the bobbin from the holder.

In the preferred form, as shown in'the drawings, I use a construction embodying three clamping-arrns. It is evident that this construction could be so varied that four clamping-arms could be used, if desired, without materially affecting the spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a bobbin-holder, a plurality of clamping-arms formed with slots, means for pivotally securing the arms in the holder, and means for supporting the arms laterally in the holder, and a plate having offsets adapted to enter the slots in the clamping-arms and prevent side movement of the clamping-arms, as described.

2. In a bobbin-holder, a plurality of clamping-arms, a pivot-plate in which the clampingarms are pivotally supported provided with upwardly-bent arms adapted to bear on the sides of the clamping-arms, a locking-plate, and means for securing the locking-plate and pivot-plate together, as and for the purpose described.

3. In a bobbin-holder, a plurality of clamping-arms formed with slots, means for pivotally securing the arms in the holder, and means for supporting the arms laterally in the holder, a plate having offsets adapted to enter the slots in the clamping-arms, and a plate having upwardly-bent arms adapted to bear on the sides of the clamping-arms. as described.

4. In a bobbin-holder, a plurality of the clamping-arms g. formed with slots g means.

for pivotally securing the arms in the holder, consisting of the frame a, the pivot-platef, and the locking-plate lb, and means for supporting the arms laterally in the holder, the locking-plate 71 having the offsets 7L2 adapted to enter the slots in the clampingar1ns, the pivot-plate f having the upwardly-bent arms f adapted to bear on the sides of the clamping-arms, and means for exerting a spring tension on the clamping-arms, as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOHAS J MURDOOK.

IVitnesses:

ADA E. HAGERTY, J. A. MILLER, Jr. 

